tst-signal.c

来自「一个C源代码分析器」· C语言 代码 · 共 45 行

#include <ansidecl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int win = 0;

void
DEFUN(handler, (sig), int sig)
{
  printf("Received signal %d (%s).\n", sig, strsignal(sig));
  win = 1;
}

int
DEFUN_VOID(main)
{
  if (signal(SIGTERM, handler) == SIG_ERR)
    {
      perror("signal: SIGTERM");
      exit(EXIT_FAILURE);
    }

  puts("Set handler.");

  printf("Sending myself signal %d.\n", SIGTERM);
  fflush(stdout);

  if (raise(SIGTERM) < 0)
    {
      perror("raise: SIGTERM");
      exit(EXIT_FAILURE);
    }

  if (!win)
    {
      puts("Didn't get any signal.  Test FAILED!");
      exit(EXIT_FAILURE);
    }

  puts("Got a signal.  Test succeeded.");
  exit(EXIT_SUCCESS);
}